Grinding-mill



(No Model.)

Gr.' R. G'ULLINGWORTH. GRINDING MILL. No. 478,252. Patented July 5,1892.

UNITED STATES PATENT OEEICE.

GEORGE R. OULLINGVORTH, OF MOUNT VERNON, NEIV YORK.

GRlNDlNG-MILL.

SPECIFICATION forming fpart of Letters Patent No. 478,252, dated J'uly5, 1892. Application filed January 2,7, 1892. Serial No. 419,374. (Nomodel.)

T0 a/ZZ whom it may concern: Y

Be it known that I, GEORGE R. CULLING- WORTH, of Mount Vernon, in thecounty of NVestchester and State of New York, have invented a new anduseful Improvement in Grinding-Mills, of which the following is aspecification, reference beingA had to the accompanying drawings.

This invention relates to that class of grinding-mills the principalelements of which are a drum, to Whichrrotary motion is given, and aroller arranged loosely within said drum and having rotary motionimparted to it by the rotation of the drum.

I will proceed to describe my improvement with reference to thedrawings, and afterward point out its novelty in claim.

Figure l represents a vertical section parallel with the plane ofrotation, of a grindingmill for crushing and pulverizing ore embodyingmy invention. Fig. 2 representsan axial section of the same.

Similar letters of reference designate corresponding parts in both thefigures.

A is the drum, represented of cylindrical form and having a concentriccircular opening a in one side or end anda concentric cir-v cularopening b in the opposite side or end. B is the loose roller arrangedwithin said drum. One of the openings, as'b, in the said drum is madelarge enough for the introduction of the said roller. On opposite sidesof the drum are concentric cylindrical iianges. C, which are supportedand support the drum, with its axis horizontal, on roller-bearings D,I), the said bearings consisting of rollers having their axles d instationarystandards E," erected on the bed-plate F. The inner peripheryot' the drum is'represented as circumferentially grooved and theexterior of the roller B as circumferentially grooved to correspond withthe inner periphery of the drum. The opening d of the drum is made withan outwardly-projecting rim which is received within theinwardly-projecting rim of the stationary circular head G, which issupported on a stationary standard H, erected on the bed-plate. In thisstationary head G there is an opening e, to which'V is attached a hopperI, through which the material to be ground is fed to the interior of thedrum A. There is another openingfin the said head from which projects apipe g for the introduction of air or water to the drum. In order tomake a moderately-tight connection between the opening d and head G, Ihave represented a leather packing h.

.I is a conical trunk concentric with the drum A and connected to theexterior thereof around the opening Z). This trunk communicates at itsouter end with a stationary outlet-pipeK, which is supported upon astandard L, erected upon the bed-plate F. To preserve a moderately-tightconnection between the trunk J and pipe K, I have represented a leatherpacking z'.

M is a scraper attached'to the stationary head G and it rests upon theroller B for the purpose of scraping the periphery thereof. This scraperis represented as pivoted on a horizontal pin j, which is affixed in thesaid head. N is another scraper, which is repre.- sented as hung on thesame pingl and which is kept in contact with the inner periphery of thedrum A by a counter-balance 7c.

Rotary motion may be given to the drum in any suitable manner-as, forinstance, by a drivingbelt O, running on the external periphery of thedrum itself. The roller being loose within the drum and kept by its ownweight at the bottom thereof is caused to rotate by the contact of thedrum or of any material that may be between itself and the druln. Thematerial to be ground being fed into the hopper I passes through theopening e into the drum and falling between the inner `periphery of thedrum and the roller B is crushed. While the crushing goes on a currentof air or water is produced through the drum, entering atfand passingout at K, and along with this current of air or water the groundmaterial is carried olf to a suitable receptacle.

manner and maybe forcedor induced through the pipes j' and K in anysuitable manner.

Y What I claim as my inventiomand desire to secure by Letters Patent,is-

The current of air or water `may be produced in any known or suitableThe combination, in a grinding-mill, of a ter-balance mounted upon it,substantially as rotary drum having on one side a stationary herein setforth.

head aorushilxff-roller in saddrum asoraper v V for tlle said drlm, anda counter-helene@ for GEORGE R' GULLINGVVOR FH 5 said scraper, a scraperfor said roller, and a \Vitnesses:

pivot attached to said stationary headV and FREDK. HAYNES, having boththe said Scrapers `and. the coun- GEORGE BARRY.

